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From: Tejun Heo <tj@kernel.org>
To: Hillf Danton <hdanton@sina.com>
Cc: syzbot <syzbot+d4bba5ccd4f9a2a68681@syzkaller.appspotmail.com>,
	ast@kernel.org, bpf@vger.kernel.org, cgroups@vger.kernel.org,
	daniel@iogearbox.net, hannes@cmpxchg.org, kafai@fb.com,
	linux-kernel@vger.kernel.org, lizefan@huawei.com,
	netdev@vger.kernel.org, songliubraving@fb.com,
	syzkaller-bugs@googlegroups.com, yhs@fb.com
Subject: Re: KASAN: null-ptr-deref Read in css_task_iter_advance
Date: Mon, 10 Jun 2019 11:19:01 -0700	[thread overview]
Message-ID: <20190610181901.GC3341036@devbig004.ftw2.facebook.com> (raw)
In-Reply-To: <00000000000055aba7058af4d378@google.com>

Hello, Hillf.

On Tue, Jun 11, 2019 at 12:59:23AM +0800, Hillf Danton wrote:
> >syzbot will keep track of this bug report. See:
> >https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
> >
> Ignore my noise if you have no interest seeing the syzbot report.

They're awesome.

> The following tiny diff, made in the hope that it may help you perhaps
> reproduce the crash, waits css lock holders and then pick task off
> the list of dying tasks.

I already posted a fix.  Well, at least I think it's the fix.

  https://www.spinics.net/lists/cgroups/msg22468.html

Thanks.

-- 
tejun

      reply	other threads:[~2019-06-10 18:19 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2019-06-10  9:30 KASAN: null-ptr-deref Read in css_task_iter_advance syzbot
2019-06-10 18:19 ` Tejun Heo [this message]

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